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// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

interface IUniswapV2Router {
    function WETH() external pure returns (address);
    function swapExactTokensForETH(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external returns (uint256[] memory amounts);
    function swapExactETHForTokens(uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external payable returns (uint256[] memory amounts);
}

contract WXDAIWrapper {
    string public name = "Wrapped xDAI";
    string public symbol = "WXDAI";
    uint8 public decimals = 18;
    uint256 public totalSupply = 100000 * 10**decimals; // 100,000 WXDAI, pegged to DAI
    mapping(address => uint256) public balances;
    mapping(address => mapping(address => uint256)) public allowances;
    address public uniswapRouterAddress;
    IUniswapV2Router private uniswapRouter;

constructor(address _uniswapRouterAddress) {
        uniswapRouterAddress = _uniswapRouterAddress;
        uniswapRouter = IUniswapV2Router(_uniswapRouterAddress);
        balances[msg.sender] = totalSupply; // Assign total supply to the creator
    }

// ERC20 functions (transfer, approve, transferFrom) here

// Function to wrap xDAI to WXDAI
    function wrap(uint256 amount) external payable {
        require(msg.value == amount, "Amount mismatch");
        balances[msg.sender] += amount;
        totalSupply += amount;
    }

// Function to unwrap WXDAI to xDAI
    function unwrap(uint256 amount) external {
        require(balances[msg.sender] >= amount, "Insufficient balance");
        payable(msg.sender).transfer(amount);
        balances[msg.sender] -= amount;
        totalSupply -= amount;
    }

// Continue with swap functions...
}